Home / 81,429,063.40-122,143,595.10-67,068,346.60

Finding the Fourth Proportional to 81,429,063.40, 122,143,595.10 and 67,068,346.60

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Solution

The fourth proportional to 81,429,063.40, 122,143,595.10 and 67,068,346.60 is: 100,602,519.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,429,063.40 : 122,143,595.10 = 67,068,346.60 : x
  2. Step 2: Convert to fraction form
    81,429,063.40/122,143,595.10 = 67,068,346.60/x
  3. Step 3: Cross multiply
    81,429,063.40x = 122,143,595.10 × 67,068,346.60
  4. Step 4: Simplify right side
    81,429,063.40x = 8,191,968,971,136,861
  5. Step 5: Solve for x
    x = 8,191,968,971,136,861/81,429,063.40
  6. Step 6: Final answer
    x = 100,602,519.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.